Battery, power consuming apparatus, and method and apparatus for manufacturing battery

ABSTRACT

A battery includes a cylindrical battery cell having a cylindrical side surface provided with a pressure relief mechanism, an electrical chamber configured to accommodate the battery cell, a collection chamber configured to collect emissions from the battery cell when the pressure relief mechanism is actuated, and an isolation component configured to isolate the electrical chamber from the collection chamber. The isolation component includes a first region and a second region. The first region is used for accommodating a first portion of the battery cell such that the first portion protrudes, towards the collection chamber, from a surface of the second region facing towards the collection chamber, and the pressure relief mechanism is disposed in a region of the cylindrical side surface located in the first portion such that the emissions are allowed to enter the collection chamber when the pressure relief mechanism is actuated.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of International Application No.PCT/CN2022/071925, filed on Jan. 14, 2022, the entire content of whichis incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of batteries, andin particular to a battery, a power consuming apparatus, and a methodand apparatus for manufacturing the battery.

BACKGROUND ART

Energy conservation and emission reduction are the keys to thesustainable development of the automobile industry. In this case,electric vehicles have become an important part of the sustainabledevelopment of the automobile industry due to their advantages in energyconservation and environmental protection. Further, for the electricvehicles, the battery technology is an important factor to theirdevelopment.

In the development of the battery technology, in addition to improvingthe performance of batteries, the safety is also a non-negligible issue.If the safety of the batteries cannot be guaranteed, the batteriescannot be used. Therefore, how to enhance the safety of batteries is anurgent technical problem to be solved in the battery technology.

SUMMARY

Embodiments of the present application provide a battery, a powerconsuming apparatus, and a method and apparatus for manufacturing thebattery, which can improve battery safety.

In a first aspect, provided is a battery, including: a plurality ofbattery cells, the battery cell being of a cylinder shape, a cylindricalside surface of the battery cell being provided with a pressure reliefmechanism, the pressure relief mechanism being configured to beactuated, when an internal pressure or temperature of the battery cellreaches a threshold, to relieve the internal pressure of the batterycell; an electrical chamber configured to accommodate the plurality ofbattery cells; a collection chamber configured to collect emissions fromthe battery cell when the pressure relief mechanism is actuated; and anisolation component configured to isolate the electrical chamber fromthe collection chamber, wherein the isolation component includes a firstregion and a second region, the first region is used for accommodating afirst portion of the battery cell such that the first portion protrudes,towards the collection chamber, from a surface of the second regionfacing towards the collection chamber, and the pressure relief mechanismis disposed in a region of the cylindrical side surface located in thefirst portion such that the emissions are allowed to enter thecollection chamber when the pressure relief mechanism is actuated.

Therefore, in the battery according to this embodiment of the presentapplication, the battery cell can be positioned and fixed by the firstregion of the isolation component, so that rolling of the battery cellis prevented and the stability of the battery is improved. Moreover, thefirst portion protrudes from the electrical chamber relative to thesecond region, that is, the battery cell can occupy part of space of thecollection chamber, thus improving the space utilization of the battery.In addition, the pressure relief mechanism of the battery cell islocated on the first portion so that the emissions are allowed to enterthe collection chamber when the pressure relief mechanism is actuated.Accordingly, the purpose of directional emission is achieved, and theimpact of the emissions on the electrical chamber is prevented, that is,the contact between the emissions and a high-voltage connectioncomponent in the electrical chamber is prevented, thereby reducing arisk of explosion of the battery and improving the safety of thebattery.

In some embodiments, the length, in an axial direction of the batterycell, of an orthographic projection of the first region on a surface ofthe isolation component facing towards the electrical chamber is greaterthan or equal to the length, in the axial direction of the battery cell,of the cylindrical side surface of the battery cell; and the length, ina second direction, of the orthographic projection is less than thediameter of the battery cell, wherein the second direction is adirection perpendicular to the axial direction of the battery cell in aplane where the orthographic projection is located.

In this way, for the first portion of the battery cell located in thefirst region, the first portion is only a partial region and not thewhole of the battery cell and is a small region of the battery cell, andaccordingly, the first portion does not occupy too much region of thecollection chamber and has less impact on the collection chamber.

In some embodiments, the first region is an opening extending throughthe isolation component.

In one aspect, it is easy to machine the opening. In another aspect,when the pressure relief mechanism located in the first portion isactuated, there is no obstruction and the emissions can be directlydischarged to the collection chamber through the opening, and theinternal pressure and temperature of the battery cell with thermalrunaway can be relieved in time to prevent thermal diffusion and improvethe safety of the battery.

In some embodiments, the isolation component has circular-arc surfacesat the opening to allow the first portion to fit the isolation componentinside the opening.

The battery cell and the isolation component have a surface contactinstead of a linear contact, which expands the area of contact betweenthe two. Accordingly, in one aspect, the stability of the battery cellin the first region can be improved and the battery cell is less proneto displacement, and in another aspect, when the isolation component isa thermal management component, the temperature adjustment efficiencycan also be improved.

In some embodiments, the first region is a recess on the isolationcomponent, and the recess protrudes, towards the collection chamber,from the surface of the second region facing towards the collectionchamber.

In this way, when the battery is in normal use, the electrical chamberand the collection chamber on two sides of the isolation component arerelatively enclosed. When thermal runaway occurs in any of the batterycells, the pressure relief mechanism of the battery cell is actuatedsuch that the emissions are discharged, and the emissions can rupturethe recess of the first region corresponding to the pressure reliefmechanism to be allowed to enter the collection chamber. Moreover, sincethe recesses of the first region at other positions are not ruptured,the emissions (especially high-temperature gases or flames) entering thecollection chamber will not return to the electrical chamber through thefirst region at other positions, and accordingly, the impact on anotherbattery cell can be prevented, the possibility of thermal diffusion canbe reduced, and the safety of the battery is improved.

In some embodiments, the recess has a circular-arc cross-section in afirst plane, and the first plane is a plane perpendicular to the axialdirection of the battery cell. The recess with a circular-arccross-section occupies less space in the collection chamber and has lessinfluence on the arrangement of the collection chamber as compared withrecesses in other shapes.

In some embodiments, the first portion fits the isolation componentinside the recess. In this case, the area of contact between the batterycell and the isolation component is a circular-arc surface instead of alinear contact, thus the area of contact between the two is expanded.Accordingly, in one aspect, the stability of the battery cell in thefirst region can be improved, and in another aspect, when the isolationcomponent is a thermal management component, the temperature adjustmentefficiency can also be improved.

In some embodiments, the recess has a rectangular cross-section in afirst plane, and the first plane is a plane perpendicular to the axialdirection of the battery cell. The rectangular recess is simple instructure and easy to machine.

In some embodiments, the isolation component has circular-arc surfacesat the opening of the recess to allow the first portion to fit theisolation component at the opening of the recess. The battery cell andthe isolation component have a surface contact instead of a linearcontact, which expands the area of contact between the two. Accordingly,in one aspect, the stability of the battery cell in the first region canbe improved, and in another aspect, when the isolation component is athermal management component, the temperature adjustment efficiency canalso be improved.

In some possible embodiments, the electrical chamber is provided with afiller inside, and the filler is used to fill voids between theplurality of battery cells.

In one aspect, the filler may provide restraint for the battery cellinside to prevent the battery cell from moving. In another aspect, thefiller may also restrict a shell of the battery cell, increase thestrength of the shell, and prevent the portion of the surface of thebattery cell located inside the electrical chamber other than the firstportion from being ruptured when thermal runaway occurs in a certainbattery cell, thereby preventing the spread of thermal runaway andimproving safety performance of the battery.

In some embodiments, the electrical chamber accommodates a plurality ofbattery cell groups arranged in a first direction, each of the pluralityof battery cell groups includes a plurality of battery cells arranged ina second direction, the first direction, the second direction and theaxial direction of the battery cell are perpendicular to each other, andthe plurality of battery cells of the same battery cell group correspondto the same isolation component.

The plurality of battery cells in the battery are arranged in a regularpattern, which can increase the space utilization of the battery. Sincethe plurality of battery cells of the same battery cell group aredisposed to correspond to the same isolation component, the plurality ofbattery cells correspond to the same collection chamber, that is, theemissions discharged from the pressure relief mechanisms of theplurality of battery cells can be discharged to the same collectionchamber, thereby saving space and improving the space utilization of thebattery.

In some embodiments, the plurality of battery cells of the same batterycell group are in a one-to-one correspondence with a plurality of firstregions on the same isolation component, so that it is possible toensure that each battery cell can discharge emissions towards thecollection chamber directionally when thermal runaway occurs in thebattery cell, and moreover, each battery cell can be positioned andmounted by the first region such that the first portion of the batterycell can be located in the first region, thus improving the stability ofthe battery.

In some embodiments, two adjacent battery cell groups of the pluralityof battery cell groups correspond to two isolation components disposedopposite each other, such that the electrical chamber is disposedbetween the two isolation components and the electrical chamber islocated between two collection chambers.

For any two adjacent battery cell groups in the first direction, the twobattery cell groups are disposed in the same electrical chamber, so thatspace of the electrical chamber can be saved by staggering of batterycells of the two battery cell groups. In this case, the two collectionchambers corresponding to the two battery cell groups may be located ontwo opposite sides of the electrical chamber, so that the thickness ofthe battery in the first direction can be minimized.

In some embodiments, the battery further includes two end plates, thetwo end plates are respectively disposed, in the axial direction of thebattery cells, on two sides of the two adjacent battery cell groups, andthe two end plates are connected to the two isolation components to formthe electrical chamber.

The two end plates are respectively disposed, in the axial direction ofthe battery cells, on two sides of the two adjacent battery cell groups,so that the movement, in the axial direction of the battery cells, ofthe battery cells of the two battery cell groups can be furtherrestricted to fix the battery cells and improve the stability of thebattery.

In some embodiments, each end plate of the two end plates is providedwith a first protrusion protruding in the first direction, the isolationcomponent is provided with a first through-hole, and the firstprotrusion passes through the first through-hole such that each of theend plates is fixedly connected to the isolation component; or, each endplate of the two end plates is provided with a second through-hole, theisolation component is provided with a second protrusion protruding inthe axial direction of the battery cell, and the second protrusionpasses through the second through-hole such that each of the end platesis fixedly connected to the isolation component.

The isolation component and the end plate are fixed by cooperationbetween the protrusion and the through-hole, thereby facilitatingmachining, mounting and assembling, and further improving the productionefficiency of the battery.

In a second aspect, provided is a power consuming apparatus, including:the battery described in the first aspect or in any one of theembodiments in the first aspect.

In some embodiments, the power consuming apparatus is a vehicle, a ship,or a spacecraft.

In a third aspect, provided is a method for manufacturing a battery,including: providing a plurality of battery cells, the battery cellbeing of a cylinder shape, a cylindrical side surface of the batterycell being provided with a pressure relief mechanism, the pressurerelief mechanism being configured to be actuated, when an internalpressure or temperature of the battery cell reaches a threshold, torelieve the internal pressure; providing an electrical chamber, theelectrical chamber being configured to accommodate the plurality ofbattery cells; providing a collection chamber, the collection chamberbeing configured to collect emissions from the battery cell when thepressure relief mechanism is actuated; and providing an isolationcomponent, the isolation component being configured to isolate theelectrical chamber from the collection chamber, wherein the isolationcomponent includes a first region and a second region, the first regionis used for accommodating a first portion of the battery cell such thatthe first portion protrudes, towards the collection chamber, from asurface of the second region facing towards the collection chamber, andthe pressure relief mechanism is arranged in a region of the cylindricalside surface located in the first portion such that the emissions areallowed to enter the collection chamber when the pressure reliefmechanism is actuated.

In a fourth aspect, provided is an apparatus for manufacturing abattery, the apparatus including a module configured to perform themethod of the third aspect above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a vehicle disclosed in an embodiment ofthe present application;

FIG. 2 is an exploded view of a battery disclosed in an embodiment ofthe present application;

FIG. 3 is a partial schematic diagram of a battery disclosed in anembodiment of the present application;

FIG. 4 is a cross-sectional diagram of a battery disclosed in anembodiment of the present application;

FIG. 5 is a partial cross-sectional diagram of a battery disclosed in anembodiment of the present application;

FIG. 6 is another partial cross-sectional diagram of the batterydisclosed in an embodiment of the present application;

FIG. 7 is an enlarged view of region A in FIG. 6 ;

FIG. 8 is a partial schematic diagram of another battery disclosed in anembodiment of the present application;

FIG. 9 is a cross-sectional diagram of another battery disclosed in anembodiment of the present application;

FIG. 10 is a partial cross-sectional diagram of another batterydisclosed in an embodiment of the present application;

FIG. 11 is an enlarged view of region B in FIG. 10 ;

FIG. 12 is a schematic diagram of battery cells and an isolationcomponent disclosed in an embodiment of the present application;

FIG. 13 is a schematic top view of an isolation component disclosed inan embodiment of the present application;

FIG. 14 is a schematic top view of battery cells and an isolationcomponent disclosed in an embodiment of the present application;

FIG. 15 is a cross-sectional view of two battery cells and an isolationcomponent disclosed in an embodiment of the present application;

FIG. 16 is another cross-sectional view of two battery cells and anisolation component disclosed in an embodiment of the presentapplication;

FIG. 17 is still another cross-sectional view of two battery cells andan isolation component disclosed in an embodiment of the presentapplication;

FIG. 18 is a schematic flowchart of a method for manufacturing a batterydisclosed in an embodiment of the present application; and

FIG. 19 is a block diagram of an apparatus for manufacturing a batterydisclosed in an embodiment of the present application.

In the accompanying drawings, the figures are not drawn to scale.

DETAILED DESCRIPTION OF EMBODIMENTS

The implementations of the present application will be further describedin detail below in conjunction with the accompanying drawings andembodiments. The following detailed description of the embodiments andthe accompanying drawings are used to illustrate the principle of thepresent application by way of example and are not intended to limit thescope of the present application. That is, the present application isnot limited to the described embodiments.

In the description of the present application, it should be noted that“a plurality of” means two or more, unless otherwise specified. Theorientation or position relationship indicated by the terms “upper”,“lower”, “left”, “right”, “inner”, “outer”, etc. is only for theconvenience of describing the present application and simplifying thedescription, rather than indicating or implying that the device orelement referred to must have a particular orientation or be constructedand operated in a particular orientation, and therefore should not beconstrued as a limitation on the present application. In addition, theterms “first”, “second”, “third”, etc. are used for descriptive purposesonly, and should not be construed as indicating or implying the relativeimportance. The term “perpendicular” does not mean being perpendicularin the strict sense, but within an allowable range of tolerance. Theterm “parallel” does not mean being parallel in the strict sense, butwithin an allowable range of tolerance.

The orientation terms in the following description all indicatedirections shown in the accompanying drawings, and do not limit thespecific structure in the present application. In the description of thepresent application, it should also be noted that the terms “mounting”,“connect”, and “connection” should be interpreted in the broad senseunless explicitly defined and limited otherwise. For example, theconnection may be a fixed connection, a detachable connection, or anintegral connection, or may be a direct connection, or an indirectconnection by means of an intermediate medium. For those of ordinaryskill in the art, the specific meanings of the terms mentioned above inthe present application can be construed according to specificcircumstances.

In the embodiments of the present application, the same referencenumerals denote the same components, and for the sake of brevity, thedetailed description of the same components is omitted in differentembodiments. It should be understood that the dimensions, such asthickness, length, and width, of the various components in theembodiments of the present application showed in the accompanyingdrawings, as well as the dimensions, such as an overall thickness,length, and width, of an integrated device are merely illustrative andshould not be construed to limit the present application in any way.

In this disclosure, the phrases “at least one of A, B, and C” and “atleast one of A, B, or C” both mean only A, only B, only C, or anycombination of A, B, and C.

In the present application, a battery cell may include a lithium ionsecondary battery, a lithium ion primary battery, a lithium-sulfurbattery, a sodium-lithium ion battery, a sodium ion battery or amagnesium ion battery, etc., which will not be limited in theembodiments of the present application. The battery cell may becylindrical, flat, cuboid or in other shapes, which is also not limitedin embodiments of the present application. The battery cells aregenerally classified into three types depending on the way of package:cylindrical battery cells, prismatic battery cells and pouch batterycells, which also will not be limited in the embodiments of the presentapplication.

A battery mentioned in embodiments of the present application refers toa single physical module including one or more battery cells to providea higher voltage and capacity. For example, the battery mentioned in thepresent application may include a battery module, a battery pack, etc.The battery generally includes an enclosure for packaging one or morebattery cells. The enclosure can prevent liquid or other foreign mattersfrom affecting charging or discharging of the battery cell(s).

The battery cell includes an electrode assembly and an electrolyte. Theelectrode assembly is composed of a positive electrode plate, a negativeelectrode plate and a separator. The battery cell operates mainly byrelying on movements of metal ions between the positive electrode plateand the negative electrode plate. The positive electrode plate includesa positive electrode current collector and a positive electrode activematerial layer. A surface of the positive electrode current collector iscoated with the positive electrode active material layer, the positiveelectrode current collector not coated with the positive electrodeactive material layer protrudes from the positive electrode currentcollector coated with the positive electrode active material layer, andthe positive electrode current collector not coated with the positiveelectrode active material layer serves as a positive tab. Taking alithium ion battery as an example, the positive electrode currentcollector may be made of an aluminum, and the positive electrode activematerial may be lithium cobalt oxide, lithium iron phosphate, ternarylithium, lithium manganate, etc. The negative electrode plate includes anegative electrode current collector and a negative electrode activematerial layer. A surface of the negative electrode current collector iscoated with the negative electrode active material layer, the negativeelectrode current collector not coated with the negative electrodeactive material layer protrudes from the negative electrode currentcollector coated with the negative electrode active material layer, andthe negative electrode current collector not coated with the negativeelectrode active material layer serves as a negative tab. The negativeelectrode current collector may be made of copper, and the negativeelectrode active material may be carbon, silicon, etc. In order toensure that no fusing occurs when a large current passes, there are aplurality of positive tabs are provided and are stacked together, and aplurality of negative tabs are provided and are stacked together. Theseparator may be made of a material such as polypropylene (PP) andpolyethylene (PE). In addition, the electrode assembly may be of a woundstructure or a laminated structure, which will not be limited in theembodiments of the present application.

For development of the battery technology, various design factors shouldbe considered at the same time, such as energy density, cycling life,discharge capacity, charge-discharge rates and other performanceparameters as well as the battery safety.

For a battery, the main safety hazards come from charging anddischarging processes. In order to improve the safety performance of thebattery, a pressure relief mechanism is usually provided for a batterycell. The pressure relief mechanism refers to an element or componentthat is actuated, when an internal pressure or temperature of thebattery cell reaches a predetermined threshold, to relieve the internalpressure or heat. The predetermined threshold may be adjusted based ondifferent design requirements. The predetermined threshold may depend onmaterials of one or more of the positive electrode plate, the negativeelectrode plate, the electrolyte, and the separator in the battery cell.The pressure relief mechanism may be an element or component that issensitive to pressure or temperature, that is, when the internalpressure or temperature of the battery cell reaches the predeterminedthreshold, the pressure relief mechanism is actuated, so as to form achannel for relief of the internal pressure or heat.

The “actuated” mentioned in the present application means that thepressure relief mechanism acts, so that the internal pressure and heatof the battery cell can be relieved. Actions produced by the pressurerelief mechanism may include, but are not limited to, at least a part ofthe pressure relief mechanism being cracked, torn, or melted, etc. Afterthe pressure relief mechanism is actuated, high-temperature andhigh-pressure substances inside the battery cell are discharged outwardfrom the pressure relief mechanism as emissions. In this way, thepressure of the battery cell can be relieved under a condition of acontrollable pressure or temperature, thereby preventing the occurrenceof potentially more serious accidents.

The emissions from the battery cell mentioned in the present applicationinclude, but are not limited to, the electrolyte, dissolved or splitpositive and negative electrode plates, fragments of the separator, ahigh-temperature and high-pressure gas generated by a reaction, flames,etc.

The pressure relief mechanism on the battery cell has an importantinfluence on the safety of the battery. For example, when a battery cellis short-circuited, overcharged, etc., the battery cell may beinternally subjected to thermal runaway, so that the pressure ortemperature may suddenly rise. In this case, the internal pressure andheat can be released outward by means of the actuation of a pressurerelief mechanism to prevent the battery cell from exploding and catchingfire.

Therefore, considering that in a battery assembly process, takingrectangular-shaped battery cells as an example, the adjacent batterycells usually abut against each other through a wall with larger area,therefore, the pressure relief mechanism may be disposed on a wall withsmaller area of the battery cell, for example, the pressure reliefmechanism may be disposed on a cover plate at the top end of the batterycell so that the impact on performance of the pressure relief mechanismis prevented to ensure safety performance of the battery. However, for anon-rectangular shaped battery cell, such as a cylindrical battery cell,due to the shape limitation of the battery cell, if the pressure reliefmechanism is disposed on a round cover plate at the top end, whenthermal runaway occurs in the battery cell, poor pressure relief may becaused, which is easy to lead to explosion of the battery cell.Moreover, when pressure is relieved from the cover plate at the top end,the gas emission is more likely to be in contact with the high and lowvoltage components, which will trigger a high-voltage ignition andintensify thermal diffusion between the battery cells. However, if thepressure relief mechanism is disposed at another position of the batterycell, due to shape features of the cylindrical battery cell, it is alsonecessary to consider how to prevent the influence of the pressurerelief mechanism on each battery cell when assembling the battery.

Therefore, the embodiments of the present application provide a battery.The battery includes a plurality of cylindrical battery cells, and acylindrical side surface of the battery cell is provided with a pressurerelief mechanism. The battery further includes an electrical chamber anda collection chamber that are isolated by an isolation component, theelectrical chamber being configured to accommodate the plurality ofbattery cells; and the collection chamber being configured to collectemissions from the battery cell when the pressure relief mechanism isactuated. The isolation component is provided with a first region and asecond region, the first region is used for accommodating a firstportion of the battery cell such that the first portion protrudes,towards the collection chamber, from the surface of the second regionfacing towards the collection chamber. In this way, the battery cell canbe positioned and fixed by the first region of the isolation componentso that rolling of the battery cell is prevented and the stability ofthe battery is improved. Moreover, the first portion protrudes from theelectrical chamber relative to the second region, that is, the batterycell can occupy part of space of the collection chamber, thus improvingthe space utilization of the battery. In addition, the pressure reliefmechanism of the battery cell is located on the first portion so thatthe emissions are allowed to enter the collection chamber when thepressure relief mechanism is actuated. Accordingly, the purpose ofdirectional emission is achieved, and the impact of the emissions on theelectrical chamber is prevented, that is, the contact between theemissions and a high-voltage connection in the electrical chamber isprevented, thereby reducing a risk of explosion of the battery andimproving the safety of the battery.

The technical solution described in the embodiments of the presentapplication is applicable to various power consuming apparatuses usingbatteries.

The power consuming apparatus may be a vehicle, a mobile phone, aportable device, a notebook computer, a ship, a spacecraft, an electrictoy, an electric tool, etc. The vehicle may be a fuel vehicle, a gasvehicle or a new-energy vehicle. The new-energy vehicle may be a batteryelectric vehicle, a hybrid vehicle, an extended-range vehicle, etc. Thespacecraft includes an airplane, a rocket, an aerospace plane, aspaceship, etc. The electric toy includes a stationary or mobileelectric toy, such as a game machine, an electric toy car, an electrictoy ship, and an electric toy airplane. The electric tool includes anelectric metal cutting tool, an electric grinding tool, an electricassembling tool, and an electric railway tool, such as an electricdrill, an electric grinder, an electric wrench, an electric screwdriver,an electric hammer, an electric impact drill, a concrete vibrator, andan electric planer. The power consuming apparatuses mentioned above arenot specially limited in the embodiments of the present application.

For ease of description, an example in which the power consumingapparatus refers to a vehicle is used for description in the followingembodiments.

For example, FIG. 1 shows a schematic diagram of a vehicle 1 accordingto an embodiment of the present application. The vehicle 1 may be a fuelvehicle, a gas vehicle, or a new-energy vehicle. The new-energy vehiclemay be a battery electric vehicle, a hybrid vehicle, an extended-rangevehicle, etc. The vehicle 1 may be internally provided with a motor 40,a controller 30 and a battery 10. The controller 30 is used forcontrolling the battery 10 to supply power to the motor 40. For example,the battery 10 may be arranged at a bottom, a head or a tail of thevehicle 1. The battery 10 may be used for supplying power to the vehicle1. For example, the battery 10 may serve as a power source for operatingthe vehicle 1 for use in a circuit system of the vehicle 1, for example,to meet the working power demand of the vehicle 1 during startup,navigation and running. In another embodiment of the presentapplication, the battery 10 may not only serve as a power source foroperating the vehicle 1, but may also serve as a power source fordriving the vehicle 1, replacing or partially replacing fuel or naturalgas, to provide driving power for the vehicle 1.

The battery may include a plurality of battery cells in order to meetdifferent power demands, with the plurality of battery cells being inseries connection, in parallel connection, or in series-parallelconnection. The series-parallel connection refers to a combination ofseries connection and parallel connection. The battery may also bereferred to as a battery pack. Optionally, the plurality of batterycells may be in series connection or in parallel connection or inseries-parallel connection to constitute a battery module, and then aplurality of battery modules may in series connection or in parallelconnection or in series-parallel connection to constitute the battery.That is to say, the plurality of battery cells may directly constitutethe battery, or may first constitute the battery modules that may thenconstitute the battery. The embodiments of the present application arenot limited thereto.

FIG. 2 shows an exploded view of a battery 10 according to an embodimentof the present application. FIG. 3 shows a schematic diagram of anassembly of some components in a battery 10 according to an embodimentof the present application. For example, FIG. 3 is a schematic diagramof an assembly of some components in the battery 10 shown in FIG. 2 .FIG. 4 shows a cross-sectional view of a battery 10 according to anembodiment of the present application. For example, the battery 10 mayhave an assembly structure of the battery 10 shown in FIG. 2 . Thecross-section may be a plane perpendicular to an axial direction of abattery cell in the battery. As shown in FIGS. 2 to 4 , the battery 10include: a plurality of battery cells 20, the battery cell 20 being of acylinder shape, a cylindrical side surface of the battery cell 20 beingprovided with a pressure relief mechanism 21, the pressure reliefmechanism 21 being configured to be actuated, when an internal pressureor temperature of the battery cell 20 reaches a threshold, to relievethe internal pressure of the battery cell 20; an electrical chamber 15configured to accommodate the plurality of battery cells 20; acollection chamber 16 configured to collect emissions from the batterycell 20 when the pressure relief mechanism 21 is actuated; and anisolation component 12 configured to isolate the electrical chamber 15from the collection chamber 16, wherein the isolation component 12includes a first region 121 and a second region 122, the first region121 is used for accommodating a first portion 22 of the battery cell 20such that the first portion 22 protrudes, towards the collection chamber16, from a surface of the second region 122 facing towards thecollection chamber 16, and the pressure relief mechanism 21 is disposedin a region of the cylindrical side surface located in the first portion22 such that the emissions are allowed to enter the collection chamber16 when the pressure relief mechanism 21 is actuated.

Therefore, in the battery 10 according to the embodiments of the presentapplication, the cylindrical battery cell 20 is positioned and fixed bythe first region 121 provided on the isolation component 12 so thatrolling of the battery cell 20 is prevented and the stability of thebattery 10 is improved. Moreover, the first portion 22 of the batterycell 20 protrudes from the electrical chamber 15 relative to the secondregion 122, that is, the battery cell 20 can occupy part of space of thecollection chamber 16, thus improving the space utilization of thebattery 10. In addition, the pressure relief mechanism 21 of the batterycell 20 is located on the first portion 22 so that the emissions areallowed to enter the collection chamber 16 when the pressure reliefmechanism 21 is actuated. Accordingly, the purpose of directionalemission is achieved, and the impact of the emissions on the electricalchamber 15 is prevented, that is, the contact between the emissions anda high-voltage connection in the electrical chamber 15 is prevented,thereby reducing a risk of explosion of the battery 10 and improving thesafety of the battery 10.

The battery 10 according to the embodiments of the present applicationincludes the electrical chamber 15 and the collection chamber 16,optionally, the battery 10 further includes an enclosure 11 for formingthe electrical chamber 15 and the collection chamber 16. As shown inFIGS. 2 to 4 , the enclosure 11 has a hollow structure inside, and theplurality of battery cells 20 are accommodated in the enclosure 11. Theenclosure 11 may include two parts, referred to herein as a firstenclosure portion 111 and a second enclosure portion 112 respectively.The first enclosure portion 111 and the second enclosure portion 112 aresnap-fitted together. The first enclosure portion 111 and the secondenclosure portion 112 may be shaped depending on the shape of acomponent accommodated inside, for example, the shape of a combinationof the plurality of battery cells 20 accommodated inside, and at leastone of the first enclosure portion 111 and the second enclosure portion112 is provided with an opening. For example, as shown in FIG. 2 ., onlyone of the first enclosure portion 111 and the second enclosure portion112 may be a hollow cuboid provided with an opening, and the other onemay be plate-shaped to cover the opening. For example, taking an exampleherein in which the second enclosure portion 112 is a hollow cuboidprovided with an opening 1113 and the first enclosure portion 111 isplate-shaped, the first enclosure portion 111 covers the opening of thesecond enclosure portion 112 to form the enclosure 11 provided with anenclosed chamber that may be used for accommodating the plurality ofbattery cells 20. The plurality of battery cells 20 are connected toeach other in parallel or in series or in series and parallel beforebeing placed in the enclosure 11 formed by snap-fitting the firstenclosure portion 111 and the second enclosure portion 112.

For another example, different from that shown in FIG. 2 , each of thefirst enclosure portion 111 and the second enclosure portion 112 may bea hollow cuboid and has one side with an opening, the opening of thefirst enclosure portion 111 and the opening of the second enclosureportion 112 are provided opposite each other, and the first enclosureportion 111 and the second enclosure portion 112 are snap-fitted to eachother to form the enclosure 11 provided with an enclosed chamber.

The enclosure 11 includes an electrical chamber 15 and a collectionchamber 16, wherein the electrical chamber 15 is configured toaccommodate the plurality of battery cells 20. Specifically, the battery10 may further include a bus component 14, the bus component 14 may beused for achieving an electrical connection, such as parallelconnection, series connection, or series-parallel connection, betweenthe plurality of battery cells 20. Specifically, the bus component 14may implement the electrical connection between the battery cells 20 byconnecting electrode terminals of the battery cells 20. Further, the buscomponent 14 may be fixed to the electrode terminals of the batterycells 20 by welding.

In an embodiment of the present application, the electrical chamber 15accommodates the plurality of cylindrical battery cells 20, and theplurality of battery cells 20 may be arranged and assembled by a certainpattern to improve the space utilization of the electrical chamber 15,thus improving energy density of the battery 10. For example, theplurality of battery cells 20 may have the same or different dimensions.The plurality of battery cells 20 are illustrated in this embodiment ofthe present application with the same dimensions, which can make theplurality of battery cells 20 have the same capacity, so as tofacilitate the electrical connection between the plurality of batterycells 20, and also facilitate the arrangement of the plurality ofbattery cells 20.

Specifically, as shown in FIGS. 2 to 4 , the electrical chamber 15accommodates a plurality of battery cell groups arranged in the firstdirection Z, each of the plurality of battery cell groups includes aplurality of battery cells 20 arranged in the second direction Y, andthe first direction Z, the second direction Y and the axial direction Xof the battery cells 20 are perpendicular to each other. For acylindrical battery cell 20, the axial direction X of the battery cell20 is the axial direction X of the cylinder. The plurality of batterycells 20 in the electrical chamber 15 are arranged into an array, sothat space of the electrical chamber 15 can be effectively used.

Moreover, considering features of the cylinder, the plurality of batterycell groups can be staggered to reduce the gap between the battery cells20, thus improving the space utilization. Specifically, as shown inFIGS. 2 to 4 , for a plane perpendicular to the first direction Z,projections of axes of the plurality of battery cells 20 on the plane donot overlap each other. Further, the projections of the axes of theplurality of battery cells 20 on this plane may have equal spacing,which allows the battery cells 20 of different battery cell groups to bearranged in a staggering manner, so that space is utilized reasonablyand the gap between the battery cells 20 is reduced.

The cylindrical side surface of the battery cell 20 in the embodimentsof the present application is provided with the pressure reliefmechanism 21. The cylindrical side surface is a curved surface aroundthe axial direction X of the battery cell 20, i.e., the side of thecylinder. The pressure relief mechanism 21 may be disposed in variousmanners. For example, the pressure relief mechanism 21 may be anindentation on the battery cell 20 such that the thickness of a shell ofthe battery cell 20 at the pressure relief mechanism 21 is less than thethickness of other regions, that is, the strength of the pressure reliefmechanism 21 is relatively weak. In this way, when thermal runawayoccurs in the battery cell 20 and the internal temperature or pressureof the battery cell reaches a preset value, the pressure reliefmechanism 21 can be broken at the indentation to relieve the internalpressure or temperature. For another example, the pressure reliefmechanism 21 may also be made of a thermosensitive material. In thisway, when thermal runaway occurs in the battery cell 20 and the internaltemperature of the battery cell reaches a preset value, the pressurerelief mechanism 21 can be melted to relieve the internal pressure ortemperature. However, the embodiments of the present application are notlimited thereto.

In the embodiments of the present application, the battery 10 furtherincludes the collection chamber 16 to collect the emissions dischargedthrough the pressure relief mechanism 21 after the pressure reliefmechanism 21 is actuated so as to prevent short circuits caused by theemissions contacting high-voltage components. Specifically, to achievedirectional pressure relief of the pressure relief mechanism 21 towardsthe collection chamber 16, the battery 10 includes the isolationcomponent 12, the isolation component 12 being configured to isolate theelectrical chamber 15 from the collection chamber 16. As shown in FIGS.2 to 4 , the isolation component 12 includes a first region 121 and asecond region 122, the first region 121 is used for accommodating afirst portion 22 of the battery cell 20 such that the first portion 22protrudes, towards the collection chamber 16, from the surface of thesecond region 122 facing towards the collection chamber 16. Moreover,the pressure relief mechanism 21 is disposed in the region of thecylindrical side surface located in the first portion 22, such that whenthe pressure relief mechanism 21 is actuated, the emissions dischargedfrom the pressure relief mechanism 21 can enter the collection chamber16 smoothly.

It should be understood that the isolation component 12 of theembodiment of the present application may serve as a thermal managementcomponent, that is, the isolation component 12 may accommodate a fluidto adjust the temperature of the plurality of battery cells 20. Thefluid here may be liquid or gas, and temperature adjustment refers toheating or cooling the plurality of battery cells 20. In the case ofcooling or lowering the temperature of the battery cell 20, theisolation component 12 is configured to accommodate a cooling fluid tolower the temperature of the plurality of battery cell 20. In addition,the isolation component 12 may further be configured to heat and risethe temperature of the plurality of battery cells 20, which is notlimited in the embodiments of the present application. Optionally, thefluid may flow in a circulating manner to achieve better temperatureadjustment effects. Optionally, the fluid may be water, a mixture ofwater and ethylene glycol, air, etc.

Optionally, as shown in FIGS. 2 to 4 , the plurality of battery cells 20of the same battery cell group correspond to the same isolationcomponent 12. Considering the arrangement pattern of the battery cells20 in the battery 10, the plurality of battery cells 20 of the samebattery cell group are disposed corresponding to the same isolationcomponent 12, the plurality of battery cells 20 then correspond to thesame collection chamber 16, that is, the emissions discharged frompressure relief mechanisms 21 of the plurality of battery cells 20 canbe discharged to the same collection chamber 16, thereby saving spaceand improving the space utilization of the battery 10.

As shown in FIGS. 2 to 4 , the plurality of battery cells 20 of the samebattery cell group are in a one-to-one correspondence with a pluralityof first regions 121 on the same isolation component 12. In the casethat each battery cell 20 of the plurality of battery cells 20 of thesame battery cell group is provided with a first region 121correspondingly, the emissions can be directly discharged through thecorresponding first region 121 of the isolation component 12 whenthermal runaway occurs in any of the battery cells 20. In addition, thebattery cells 20 are each of a cylinder shape, the plurality of batterycells 20 of the same battery cell group are disposed in one-to-onecorrespondence with the plurality of first regions 121 on the sameisolation component 12, so that it is possible to ensure that eachbattery cell 20 can discharge emissions towards the collection chamber16 directionally when thermal runaway occurs in the battery cell, andmoreover, each battery cell 20 can be positioned and mounted by thefirst region 121 such that the first portion 22 of the battery cell 20can be located in the first region 121, improving the stability of thebattery 10.

Optionally, two adjacent battery cell groups of the plurality of batterycell groups correspond to two isolation components 12 disposed oppositeeach other such that the electrical chamber 15 is disposed between thetwo isolation components 12 and the electrical chamber 15 is locatedbetween two collection chambers 16. As shown in FIGS. 2 to 4 , for anytwo adjacent battery cell groups in the first direction Z, the twobattery cell groups are disposed in the same electrical chamber 15, suchthat space of the electrical chamber 15 can be saved by staggering ofthe battery cells 20 of the two battery cell groups. In this case, thetwo collection chambers 16 corresponding to the two battery cell groupscan be respectively located on two opposite sides of the electricalchamber 15, so that the thickness of the battery 10 in the firstdirection Z can be minimized. Especially when the battery 10 onlyincludes two battery cell groups, this arrangement not only facilitatesmounting and positioning of each battery cell 20, but can also greatlyimproves the space utilization of the battery 10.

Optionally, the battery 10 according to the embodiments of the presentapplication further includes: two end plates 13. The two end plates 13are respectively disposed, in the axial direction X of the battery cells20, on two sides of the two adjacent battery cell groups, and the twoend plates 13 are connected to the two isolation components 12 to formthe electrical chamber 15. A plurality of isolation components 12 in theembodiments of the present application are disposed in the firstdirection Z. For example, two isolation components 12 are respectivelydisposed, in the first direction Z, on two sides of two adjacent batterycell groups, so that the two isolation components 12 can limit themovement, in the first direction Z, of the plurality of battery cells 20inside. Moreover, the two end plates 13 are respectively disposed, inthe axial direction X of the battery cells 20, on two sides of the twoadjacent battery cell groups, so that the movement, in the axialdirection X of the battery cells 20, of the battery cells of the twobattery cell groups can be further restricted to fix the battery cells20 and improve the stability of the battery 10.

Optionally, as shown in FIGS. 2 to 4 , the surface of the end plate 13towards the battery cells 20 may also be provided with limitingstructures 133 for fixing the battery cells 20. Specifically, thelimiting structures 133 may be in a one-to-one correspondence with thebattery cells 20 to be used for restricting the movement of each batterycell 20. The limiting structure 133 may be a protrusion structureprotruding on the surface of the end plate 13 protruding towards thebattery cell 20. For example, a bracket-shaped limiting structure 133 asshown in the figure can be provided corresponding to the cylindricalbattery cell 20 to restrict the movement of the battery cell 20 in thefirst direction Z or in the second direction Y, so as to further improvethe stability of the battery 10.

It should be understood that the end plate 13, the isolation component12, and the second enclosure portion 112 in the embodiments of thepresent application can be used to form the electrical chamber 15, asshown in FIGS. 2 to 4 . Optionally, the electrical chamber 15 isprovided with a filler 151, and the filler 151 is used to fill voidsbetween the plurality of battery cells 20. FIG. 5 shows a schematicdiagram of the electrical chamber 15 according to an embodiment of thepresent application. As shown in FIG. 5 , since the battery cells 20 arecylindrical in shape and the electrical chamber 15 formed by the endplate 13, the isolation component 12, and the second enclosure portion112 is usually a cuboid, there are voids in the electrical chamber 15.The voids are filled with the filler 151, which can provide a restraintfor the battery cells 20 inside and prevent the battery cell 20 frommoving in one aspect. In another aspect, the filler 151 can alsorestrict a shell of the battery cell 20, and prevent the portion of thesurface of the battery cell 20 located inside the electrical chamber 15other than the first portion 22 from being ruptured when thermal runawayoccurs in a certain battery cell 20, thereby preventing the spread ofthermal runaway and improving safety performance of the battery 10.

Optionally, in the case where the filler 151 is disposed in theelectrical chamber 15, the portion of the battery cell 20 disposed inthe electrical chamber 15 has an increased strength due to the restrainteffect of the filler 151, and its strength is greater than the strengthof the first portion 22. In this case, when thermal runaway occurs inthis battery cell 20, even if this battery cell 20 is not provided withthe pressure relief mechanism 21, the probability of the first portion22 being ruptured is much greater than that of other portions located inthe electrical chamber 15. Therefore, the battery cell 20 may not beprovided with the pressure relief mechanism 21, or the pressure reliefmechanism 21 of the battery cell 20 is the first portion 22, and thereis no need to form the pressure relief mechanism 21 by additionallyproviding an indentation region or a thermosensitive region, so that amanufacturing process of the battery cell 20 can be simplified, anddirectional blasting of the battery cell 20 as well as discharging theemissions towards the collection chamber 16 can be ensured.

Optionally, the filler 151 in the embodiment of the present applicationmay choose a material with a good heat dissipation effect. For example,the filler 151 may be a thermally conductive adhesive. However, theembodiments of the present application are not limited thereto.

It should be understood that the connection manner between the end plate13 and the isolation component 12 in the embodiment of the presentapplication can be set flexibly according to the actual application. Theembodiments of the present application are not limited thereto. Forexample, each end plate 13 of the two end plates 13 is provided with afirst protrusion 131 protruding in the first direction Z, the isolationcomponent 12 is provided with a first through-hole 123, and the firstprotrusion 131 passes through the first through-hole 123 such that eachof the end plates 13 is fixedly connected to the isolation component 12.Specifically, FIG. 6 shows a partial schematic diagram of anothercross-section of the battery 10 according to an embodiment of thepresent application. The cross-section is a plane perpendicular to thesecond direction Y. The battery 10 shown in FIG. 6 may be the battery 10as shown in FIGS. 2 to 4 ; and FIG. 7 is a partial enlarged view ofregion A in FIG. 6 . As shown in FIGS. 6 and 7 , each end plate 13 maybe provided with at least one first protrusion 131, the first protrusion131 protrudes towards the isolation component 12; correspondingly, eachisolation component 12 may be provided with at least one firstthrough-hole 123; each first protrusion 131 passes through thecorresponding first through-hole 123 to fix the end plate 13 and theisolation component 12. This fixing manner facilitates machining andassembling, and can improve the manufacturing efficiency of the battery10.

Optionally, the first through-hole 123 and the first protrusion 131 mayhave the same or different shapes, which can be set flexibly accordingto the actual application. For example, as shown in FIGS. 6 and 7 , theshapes of the first through-hole 123 and the first protrusion 131 may beset to be the same, for example, both are set to be rectangular, and thedimension of the first protrusion 131 is slightly smaller than thedimension of the first through-hole 123, so that the first protrusion131 can pass through the first through-hole 123 and be stably fixed inthe first through-hole 123, making the end plate 13 and the isolationcomponent 12 stabilized relatively.

Optionally, each end plate 13 is provided with a plurality of firstprotrusions 131, and correspondingly, the isolation component 12 is alsoprovided with a plurality of first through-holes 123, so that the endplate 13 and the isolation component 12 are stabilized better. Here, theplurality of first protrusions 131 may have the same or differentdimensions, and the spacing between the plurality of first protrusions131 may be the same or different. For example, the plurality of firstprotrusions 131 may be distributed on the end portion of the end plate13 towards the isolation component 12 so that different regions of theend plate 13 are all stably connected to the isolation component 12.

For another example, similarly, each end plate 13 of the two end plates13 is provided with a second through-hole 132, the isolation component12 is provided with a second protrusion 124 protruding in the axialdirection X of the battery cell 20, and the second protrusion 124 passesthrough the second through-hole 132 such that each of the end plates 13is fixedly connected to the isolation component 12. FIG. 8 shows aschematic diagram of an assembly of some components in a battery 10according to another embodiment of the present application. FIG. 9 is across-sectional view of a battery 10 according to another embodiment ofthe present application. The cross-section may be a plane perpendicularto the axial direction X of the battery cell 20 in the battery 10, andthe battery 10 of FIG. 8 is a portion of the battery 10 shown in FIG. 9. FIG. 10 shows a partial schematic diagram of another cross-section ofa battery 10 according to another embodiment of the present application.The cross-section is a plane perpendicular to the second direction Y,and the battery 10 shown in FIG. 10 may be a portion of the battery 10as shown in FIG. 8 . FIG. 11 is an enlarged view of region B in FIG. 10. As shown in FIGS. 8 to 11 , each end plate 13 is provided with atleast one second through-hole 132; correspondingly, each isolationcomponent 12 may be provided with at least one second protrusion 124;each second protrusion 124 passes through the corresponding secondthrough-hole 132 to fix the end plate 13 and isolation component 12.This fixing manner facilitates machining and assembling, and can improvethe manufacturing efficiency of the battery 10.

Optionally, the second protrusion 124 and the second through-hole 132may have the same or different shapes which can be set flexiblyaccording to the actual application. For example, as shown in FIGS. 8 to11 , the second through-hole 132 and the second protrusion 124 may beset to have the same shape, for example, both are set to be rectangular,and the dimension of the second protrusion 124 is slightly smaller thanthe dimension of the second through-hole 132, so that the secondprotrusion 124 can pass through the second through-hole 132 and bestably fixed in the second through-hole 132, making the end plate 13 andthe isolation component 12 stabilized relatively.

Optionally, each isolation component 12 may be provided with a pluralityof second protrusions 124, and correspondingly, the end plate 13 mayalso be provided with a plurality of second through-holes 132, makingthe end plate 13 and the isolation component 12 stabilized better. Theplurality of second protrusions 124 may have the same or differentdimensions, and the spacing between the plurality of second protrusions124 may be the same or different. For example, the plurality of secondprotrusions 124 may be distributed on an edge portion of the isolationcomponent 12 towards the end plate 13, so that different regions of theisolation component 12 are all stably connected to the end plate 13.

The battery cell 20 and the isolation component 12 corresponding theretoin the embodiments of the present application will be described indetail below with reference to the accompanying drawings. FIG. 12 showsa schematic diagram of battery cells 20 and an isolation component 12corresponding thereto, where the battery cells 20 may be the batterycells 20 included in any of the battery cell group shown in FIGS. 2 to12 , and the first portion 22 of the battery cell 20 is disposed in thefirst region 121 of the corresponding isolation component 12. FIG. 13 isa schematic top view of an isolation component 12. The isolationcomponent 12 in FIG. 13 may be the isolation component 12 in FIG. 12 .FIG. 14 shows a schematic top view of battery cells 20 and an isolationcomponent 12 corresponding thereto. The battery cells 20 and theisolation component 12 in FIG. 14 may be the battery cells 20 and theisolation component 12 in FIG. 12 .

As shown in FIGS. 12 to 14 , the battery cell 20 in the embodiments ofthe present application further includes an electrode terminal 23. Theelectrode terminal 23 may be configured to be electrically connected toan electrode assembly inside the battery cell 20 to output electricalenergy of the battery cell 20. Specifically, the battery cell mayinclude two electrode terminals 23. The electrode terminal may include apositive electrode terminal and a negative electrode terminal. Thepositive electrode terminal is configured to be electrically connectedto a positive tab, and the negative electrode terminal is configured tobe electrically connected to a negative tab. The positive electrodeterminal may be directly or indirectly connected to the positive tab,and the negative electrode terminal may be directly or indirectlyconnected to the negative tab. For example, the positive electrodeterminal is electrically connected to the positive tab by means of aconnecting member, and the negative electrode terminal is electricallyconnected to the negative tab by means of another connecting member.

Optionally, as shown in FIGS. 12 to 14 , for the cylindrical batterycell 20 in the embodiments of the present application, the battery cell20 is provided with electrode terminals 23 on two cylindrical bottomsurfaces. In this way, by providing a plurality of bus components 14respectively at two ends of the plurality of battery cells 20, theelectrical connection between the plurality of battery cells 20 can beachieved, and assembling and electrical connection are facilitated.

Optionally, as shown in FIGS. 12 to 14 , considering that the pluralityof battery cells 20 disposed in the battery 10 usually have the sameshape and dimension, correspondingly, the plurality of first regions 121on the isolation component 12 may also have the same shape anddimension. This facilitates machining of the isolation component 12, andalso allows any one of the first regions 121 to be adapted to any one ofthe battery cells 20 during mounting, thereby improving themanufacturing efficiency of the battery 10.

Optionally, the shapes of the plurality of first regions 121 provided onthe isolation component 12 may be set according to the practicalapplication. For example, an orthographic projection of each firstregion 121 on the surface of the isolation component 12 towards theelectrical chamber 15 may be rectangular, triangular or oval, etc. FIGS.12 to 14 show the orthographic projection as a rectangle, for example.In one aspect, it is easy to machine the rectangle, and in anotheraspect, when the orthographic projection is a rectangle, the length, inthe axial direction X of the battery cell 20, of the orthographicprojection at different positions is the same, and the length, in thesecond direction Y, of the orthographic projection is also the same. Inthis way, when the cylindrical battery cell 20 is partially disposed inthe first region 121, the plurality of battery cells 20 may have therelatively uniform dimensions in each direction, for example, there isno circumstance that some of the battery cells 20 protrude more thanother battery cells 20, and thus the space utilization of the battery 10is improved.

As shown in FIGS. 12 to 14 , the length L1, in the axial direction X ofthe battery cell 20, of the orthographic projection of the first region121 on a surface of the isolation component 12 facing towards theelectrical chamber 15 is greater than or equal to the length L3, in theaxial direction X of the battery cell 20, of the cylindrical sidesurface of the battery cell 20; and the length L2, in the seconddirection Y, of the orthographic projection is less than the diameter L4of the battery cell 20, where the second direction Y is a direction, ina plane where the orthographic projection is located, perpendicular tothe axial direction X of the battery cell 20.

Specifically, the orthographic projection of the first region 121 on thesurface of the isolation component 12 towards the electrical chamber 15may be of any shape. The length L1 of the orthographic projection in theaxial direction X of the battery cell 20 may be the smallest of thelengths in the axial direction X of the battery cell 20 at variouspositions of the orthographic projection. Similarly, the length L2 ofthe orthographic projection in the second direction Y is the smallest ofthe lengths in the second direction Y at various positions of theorthographic projection. Since the length L1 is greater than or equal tothe length L3 and the length L2 is less than the length L4, for thefirst portion 22 of the battery cell 20 located in the first region 121,the first portion 22 is only a partial region of the battery cell 20 andnot the whole and is a small region of the battery cell 20, and thefirst portion 22 does not occupy too much region of the collectionchamber 16 and has less impact on the collection chamber 16.

It should be understood that the first region 121 in the embodiments ofthe present application can accommodate the first portion 22 of thebattery cell 20, and this first region may be set into any shapeaccording to the practical application. For example, the first region121 is an opening extending through the isolation component 12. FIG. 15shows a partial cross-sectional diagram of two battery cells 20 and acorresponding isolation component 12. The cross-section is a planeperpendicular to the axial direction X of the battery cell 20. Moreover,the two battery cells 20 in FIG. 15 may be any two adjacent batterycells 20 of the battery 10 as shown in FIGS. 2 to 14 . The two batterycells 20 correspond to two adjacent first regions 121 of the sameisolation component 12.

As shown in FIG. 15 , in the embodiment of the present application, inthe case that the first region 121 is an opening on the isolationcomponent 12, in one aspect, it is easy to machine the opening; inanother aspect, when the pressure relief mechanism 21 located in thefirst portion 22 is actuated, there is no obstruction and the emissionscan be directly discharged to the collection chamber 16 through theopening, and the internal pressure and temperature of the battery cell20 with thermal runaway can be relieved in time to prevent thermaldiffusion and improve the safety of the battery 10.

Optionally, the isolation component 12 has circular-arc surfaces 1211 atthe opening to allow the first portion 22 to fit the isolation component12 inside the opening. As shown in FIG. 15 , the battery cell 20 has acurved side surface, the first region 121 is provided with circular-arcsurfaces 1211, and the first portion 22 fits the circular-arc surfaces1211. That is, the battery cell 20 and the isolation component 12 have asurface contact instead of a linear contact, which expands the area ofcontact between the two. Accordingly, in one aspect, the stability ofthe battery cell 20 in the first region 121 can be improved and thebattery cell is less prone to displacement, and in another aspect, whenthe isolation component 12 is a thermal management component, thetemperature adjustment efficiency can also be improved.

For another example, the first region 121 is a recess on the isolationcomponent 12, and the recess protrudes, towards the collection chamber16, from the surface of the second region 122 facing towards thecollection chamber 16. FIGS. 16 and 17 show two partial cross-sectionaldiagrams of two battery cells 20 and a corresponding isolation component12, respectively. The cross-section is a plane perpendicular to theaxial direction X of the battery cell 20. The two battery cells 20 inFIGS. 16 and 17 may be any two adjacent battery cells of the battery 10,and the two battery cells 20 correspond to two adjacent first regions121 of the same isolation component 12.

As shown in FIGS. 16 and 17 , the first region 121 may be a recess onthe isolation component 12. In this way, when the battery 10 is innormal use, the electrical chamber 15 and the collection chamber 16 ontwo sides of the isolation component 12 are relatively enclosed. Whenthermal runaway occurs in any battery cell 20, the pressure reliefmechanism 21 of the battery cell is actuated such that emissions aredischarged, and the emissions can rupture the recess of the first region121 corresponding to the pressure relief mechanism 21 to be allowed toenter the collection chamber 16. Moreover, since the recess of the firstregion 121 at another position is not ruptured, the emissions(especially high-temperature gases or flames) entering the collectionchamber 16 do not return to the electrical chamber 15 through the firstregion 121 at another position, and accordingly, the impact on anotherbattery cell 20 can be prevented, the possibility of thermal diffusioncan be reduced, and the safety of the battery 10 is improved.

Optionally, the shape of the cross-section of the recess of the firstregion 121 in a plane perpendicular to the axial direction X of thebattery cell 20 may be set flexibly according to the practicalapplication. For example, the cross-section may be circular orrectangular in shape. However, the embodiments of the presentapplication are not limited thereto.

For example, as shown in FIG. 16 , the recess has a circular-arc in afirst plane, and the first plane is a plane perpendicular to the axialdirection X of the battery cell 20. The recess having a circular-arccross-section occupies less space in the collection chamber 16 and hasless impact on the arrangement of the collection chamber 16 as comparedwith recesses in other shapes.

Further, when the recess has the circular-arc cross-section in the firstplane, the first portion 22 fits the isolation component 12 inside therecess. That is, the area of contact between the battery cell 20 and theisolation component 12 is a circular-arc surface instead of a linearcontact, thus the area of contact between the two is expanded.Accordingly, in one aspect, the stability of the battery cell 20 in thefirst region 121 can be improved, and in another aspect, when theisolation component 12 is a thermal management component, thetemperature adjustment efficiency can also be improved.

For another example, as shown in FIG. 17 , the recess has a rectangularcross-section in a first plane, and the first plane is a planeperpendicular to the axial direction X of the battery cell 20. It iseasy to machine the rectangular recess, for example, it can be machinedquickly by stamping.

Further, when the recess has the rectangular cross-section in the firstplane, the isolation component 12 has circular-arc surfaces 1212 at theopening of the recess to allow the first portion 22 to fit the isolationcomponent 12 at the opening of the recess. That is, the battery cell 20and the isolation component 12 have a surface contact instead of alinear contact, which expands the area of contact between the two.Accordingly, in one aspect, the stability of the battery cell 20 in thefirst region 121 can be improved, and in another aspect, when theisolation component 12 is a thermal management component, thetemperature adjustment efficiency can also be improved.

It should be understood that, as shown in FIGS. 16 and 17 , when thefirst region 121 is a recess, a bottom wall of the recess may shield thepressure relief mechanism 21 of the battery cell 20. In order toincrease an emission speed of this pressure relief mechanism 21 to thecollection chamber 16, a clearance region may be provided on the bottomwall of the recess. The clearance region corresponds to the pressurerelief mechanism 21 in position, so that the emissions from the pressurerelief mechanism 21 can be discharged to the collection chamber 16 byrupturing the clearance region, thereby relieving the internal pressureand temperature of the battery cell 20 in time. However, the embodimentsof the present application are not limited thereto.

Optionally, the clearance region on the bottom wall of the recess may beimplemented in any manners. For example, an indentation may be providedon the bottom wall to form the clearance region, or a thermosensitivematerial may be provided on the bottom wall to form the clearanceregion. The embodiments of the present application are not limitedthereto.

The battery 10 and the power consuming apparatus according to theembodiments of the present application are described above, and a methodand apparatus for manufacturing a battery according to the embodimentsof the present application will be described below. For the parts notdescribed in detail, reference can be made to the foregoing embodiments.

FIG. 18 shows a schematic flowchart of a method 300 for manufacturing abattery according to an embodiment of the present application. As shownin FIG. 18 , the method 300 may include: S310, providing a plurality ofbattery cells 20, the battery cell 20 being of a cylinder shape, acylindrical side surface of the battery cell 20 being provided with apressure relief mechanism 21, the pressure relief mechanism 21 beingconfigured to be actuated, when an internal pressure or temperature ofthe battery cell 20 reaches a threshold, to relieve the internalpressure; S320, providing an electrical chamber 15, the electricalchamber 15 being configured to accommodate the plurality of batterycells 20; S330, providing a collection chamber 16, the collectionchamber 16 being configured to collect emissions from the battery cells20 when the pressure relief mechanism 21 is actuated; and S340,providing an isolation component 12, the isolation component 12 beingconfigured to isolate the electrical chamber 15 from the collectionchamber 16, wherein the isolation component 12 comprises a first region121 and a second region 122, the first region 121 is used foraccommodating a first portion 22 of the battery cell 20 such that thefirst portion 22 protrudes, towards the collection chamber 16, from asurface of the second region 122 facing towards the collection chamber16, and the pressure relief mechanism 21 is arranged in a region of thecylindrical side surface located in the first portion 22 such that theemissions are allowed to enter the collection chamber 16 when thepressure relief mechanism 21 is actuated.

FIG. 19 shows a block diagram of an apparatus 400 for manufacturing abattery according to an embodiment of the present application. As shownin FIG. 19 , the apparatus 400 may include: a provision module 410, theprovision module 410 being configured to: provide a plurality of batterycells 20, the battery cell 20 being of a cylinder shape, a cylindricalside surface of the battery cell 20 being provided with a pressurerelief mechanism 21, the pressure relief mechanism 21 being configuredto be actuated, when an internal pressure or temperature of the batterycell 20 reaches a threshold, to relieve the internal pressure; providean electrical chamber 15, the electrical chamber 15 being configured toaccommodate the plurality of battery cells 20; provide a collectionchamber 16, the collection chamber 16 being configured to collectemissions from the battery cell 20 when the pressure relief mechanism 21is actuated; and provide an isolation component 12, the isolationcomponent 12 being configured to isolate the electrical chamber 15 fromthe collection chamber 16, wherein the isolation component 12 includes afirst region 121 and a second region 122, the first region 121 is usedfor accommodating a first portion 22 of the battery cell 20 such thatthe first portion 22 protrudes, towards the collection chamber 16, froma surface of the second region 122 facing towards the collection chamber16, and the pressure relief mechanism 21 is arranged in a region of thecylindrical side surface located in the first portion 22 such that theemissions are allowed to enter the collection chamber 16 when thepressure relief mechanism 21 is actuated.

Although the present application has been described with reference tosome embodiments, various modifications can be made, and equivalents canbe provided to substitute for the components thereof without departingfrom the scope of the present application. In particular, the technicalfeatures mentioned in the embodiments can be combined in any manner aslong as there is no structural conflict. The present application is notlimited to the specific embodiments disclosed herein and insteadincludes all the technical solutions that fall within the scope of theclaims.

What is claimed is:
 1. A battery, comprising: a battery cell, thebattery cell being of a cylinder shape, a cylindrical side surface ofthe battery cell being provided with a pressure relief mechanism, thepressure relief mechanism being configured to be actuated, in responseto an internal pressure or temperature of the battery cell reaching athreshold, to relieve the internal pressure of the battery cell; anelectrical chamber configured to accommodate the battery cell; acollection chamber configured to collect emissions from the battery cellwhen the pressure relief mechanism is actuated; and an isolationcomponent configured to isolate the electrical chamber from thecollection chamber, wherein the isolation component comprises a firstregion and a second region, the first region is used for accommodating afirst portion of the battery cell such that the first portion protrudes,towards the collection chamber, from a surface of the second regionfacing towards the collection chamber, and the pressure relief mechanismis disposed in a region of the cylindrical side surface located in thefirst portion such that the emissions are allowed to enter thecollection chamber when the pressure relief mechanism is actuated. 2.The battery according to claim 1, wherein: a length, in an axialdirection of the battery cell, of an orthographic projection of thefirst region on a surface of the isolation component facing towards theelectrical chamber is greater than or equal to a length, in the axialdirection of the battery cell, of the cylindrical side surface of thebattery cell; and a length, in a direction perpendicular to the axialdirection of the battery cell in a plane where the orthographicprojection is located, of the orthographic projection is less than adiameter of the battery cell.
 3. The battery according to claim 1,wherein the first region is an opening extending through the isolationcomponent.
 4. The battery according to claim 3, wherein the isolationcomponent has a circular-arc surface at the opening to allow the firstportion to fit the isolation component inside the opening.
 5. Thebattery according to claim 1, wherein the first region is a recess onthe isolation component, and the recess protrudes, towards thecollection chamber, from the surface of the second region facing towardsthe collection chamber.
 6. The battery according to claim 5, wherein therecess has a circular-arc cross-section in a plane perpendicular to theaxial direction of the battery cell.
 7. The battery according to claim6, wherein the first portion fits the isolation component inside therecess.
 8. The battery according to claim 5, wherein the recess has arectangular cross-section in a plane perpendicular to the axialdirection of the battery cell.
 9. The battery according to claim 8,wherein the isolation component has a circular-arc surface at theopening of the recess to allow the first portion to fit the isolationcomponent at the opening of the recess.
 10. The battery according toclaim 1, wherein: the battery cell is one of a plurality of batterycells of the battery; and the electrical chamber is provided with afiller, and the filler is configured to fill voids between the pluralityof battery cells.
 11. The battery according to claim 1, wherein: thebattery cell is one of a plurality of battery cells in one of aplurality of battery cell groups, and the isolation component is one ofa plurality of isolation components of the battery; the electricalchamber accommodates the plurality of battery cell groups arranged in afirst direction, the plurality of battery cells in each of the pluralityof battery cell groups are arranged in a second direction, and the firstdirection, the second direction, and an axial direction of the batterycells are perpendicular to each other, and the plurality of batterycells of the same battery cell group correspond to a same isolationcomponent of the plurality of isolation components.
 12. The batteryaccording to claim 11, wherein: each of the isolation components have aplurality of first regions; and the plurality of battery cells of thesame battery cell group are in a one-to-one correspondence with theplurality of first regions on the same the isolation component.
 13. Thebattery according to claim 11, wherein: the collection chamber is one ofa plurality of collection chambers of the battery; and two adjacentbattery cell groups of the plurality of battery cell groups correspondto two isolation components disposed opposite each other such that theelectrical chamber is disposed between the two isolation components andthe electrical chamber is located between two collection chambers. 14.The battery according to claim 13, further comprising: two end plates,the two end plates being respectively disposed, in the axial directionof the battery cell, on two sides of the two adjacent battery cellgroups, and the two end plates being connected to the two isolationcomponents to form the electrical chamber.
 15. The battery according toclaim 14, wherein: each end plate of the two end plates is provided witha first protrusion protruding in the first direction, the isolationcomponent is provided with a first through-hole, and the firstprotrusion passes through the first through-hole such that each of theend plates is fixedly connected to the isolation components; or each endplate of the two end plates is provided with a second through-hole, theisolation component is provided with a second protrusion protruding inthe axial direction of the battery cell, and the second protrusionpasses through the second through-hole such that each of the end platesis fixedly connected to the isolation components.
 16. A power consumingapparatus, comprising the battery according to claim 1, wherein thebattery is configured to supply electrical energy to the power consumingapparatus.
 17. A method for manufacturing a battery, comprising:providing a battery cell, the battery cell being of a cylinder shape, acylindrical side surface of the battery cell being provided with apressure relief mechanism, the pressure relief mechanism beingconfigured to be actuated, in response to an internal pressure ortemperature of the battery cell reaching a threshold, to relieve theinternal pressure; providing an electrical chamber, the electricalchamber being configured to accommodate the battery cell; providing acollection chamber, the collection chamber being configured to collectemissions from the battery cell when the pressure relief mechanism isactuated; and providing an isolation component, the isolation componentbeing configured to isolate the electrical chamber from the collectionchamber, wherein the isolation component comprises a first region and asecond region, the first region is used for accommodating a firstportion of the battery cell such that the first portion protrudes,towards the collection chamber, from a surface of the second regionfacing towards the collection chamber, and the pressure relief mechanismis arranged in a region of the cylindrical side surface located in thefirst portion such that the emissions are allowed to enter thecollection chamber when the pressure relief mechanism is actuated. 18.An apparatus for manufacturing a battery, the apparatus comprising: aprovision module, the provision module being configured to: provide abattery cells, the battery cell being of a cylinder shape, a cylindricalside surface of the battery cell being provided with a pressure reliefmechanism, the pressure relief mechanism being configured to beactuated, in response to an internal pressure or temperature of thebattery cell reaching a threshold, to relieve the internal pressure;provide an electrical chamber, the electrical chamber being configuredto accommodate the battery cell; provide a collection chamber, thecollection chamber being configured to collect emissions from thebattery cell when the pressure relief mechanism is actuated; and providean isolation component, the isolation component being configured toisolate the electrical chamber from the collection chamber, wherein theisolation component comprises a first region and a second region, thefirst region is used for accommodating a first portion of the batterycell such that the first portion protrudes, towards the collectionchamber, from a surface of the second region facing towards thecollection chamber, and the pressure relief mechanism is arranged in aregion of the cylindrical side surface located in the first portion suchthat the emissions are allowed to enter the collection chamber when thepressure relief mechanism is actuated.